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Hill Splitter™

Hill Splitter™ tells you how you performed on the uphill and downhill sections of your session. Hill Splitter™ automatically detects all uphills and downhills by using your GPS-based speed and distance, and barometric altitude data. It shows you detailed insights into your performance, such as distance, speed, ascent and descent, for every detected hill on your course. You get data about the elevation profile of your training session, and you can compare hill stats between different sessions. Detailed information about each hill is recorded automatically, no need to take laps manually.

Hill Splitter adapts to the terrain in each session. In practice this means that when doing a session in relatively flat terrain, even small hills are counted. Then again when training in areas with large variation in elevation such as mountains, the smallest hills are not counted. This adaptation is always session specific.

The minimum ascent or descent counted as a hill differs depending on your sport profile. In downhill sports (snowboarding, downhill skiing, backcountry skiing and telemark skiing) it's 15 meters, and in all other sports it's 10 meters.

Hill Slitter requires 1 second GPS recording rate. It cannot be used with 1 minute or 2 minute recording rates.

Add the Hill Splitter view to a sport profile

By default the Hill Splitter training view is on in all running, cycling and downhill type sport profiles, but it can be added to any sport profile that uses GPS and barometric altitude.

In the Flow web service:

  1. Go to Sport Profiles, and choose edit on the sport profile you wish to add it to.
  2. Choose Related to device
  3. Choose Grit X > Training views > Add new > Fullscreen > Hill Splitter and save.

In the Flow mobile app:

  1. Go to the main menu, and, choose Sport profiles.
  2. Choose a sport and tap Edit.
  3. Add the Hill Splitter training view.
  4. When you're ready, tap Done.

Remember to sync the settings to your Polar device.

Training with Hill Splitter

After starting your session, scroll to the Hill Splitter view with the UP/DOWN buttons. Details you can view during your session include:

  • Distance : The distance of the current segment (flat, uphill or downhill)
  • Ascent/descent of current segment
  • Speed

Note that there is some delay when switching from a hill to flatland. This is to make sure that the hill is over. Even though the switch from a hill to flatland shown in the Hill Splitter training view is delayed, the end of the hill is marked correctly in the data, so when viewing your training summary in Flow web service or app it is shown correctly.

Hill details pop-up

In downhill sports (snowboarding, downhill skiing, backcountry skiing and telemark skiing) you'll get a pop-up with details from your previous hill after finishing it, and then going back uphill for 15 meters. This is designed so that you'll get the pop-up when heading back up on a ski-lift.

  • Distance : The distance of the current segment (flat, uphill or downhill)
  • Ascent/descent of current segment
  • Average speed
  • Hill number

Hill Splitter summary

After your session, you'll see the following information in the training summary:

  • Number of uphills and downhills
  • Total uphill and downhill distance

Detailed analysis in the Flow web service and app

View detailed data for each uphill, downhill and flat segment in the Flow web service after syncing your data to it after your session. An overview of your session is also available in the Flow app.

The data available for each segment depends on the sport profile and sensors you used but it can for example include altitude, power, heart rate, cadence and speed data.